int
SDL_SYS_JoystickInit(void)
{
char s[16];
int i, fd;
SDL_numjoysticks = 0;
SDL_memset(joynames, 0, sizeof(joynames));
SDL_memset(joydevnames, 0, sizeof(joydevnames));
for (i = 0; i < MAX_UHID_JOYS; i++) {
SDL_Joystick nj;
SDL_snprintf(s, SDL_arraysize(s), "/dev/uhid%d", i);
nj.index = SDL_numjoysticks;
joynames[nj.index] = strdup(s);
if (SDL_SYS_JoystickOpen(&nj) == 0) {
SDL_SYS_JoystickClose(&nj);
SDL_numjoysticks++;
} else {
SDL_free(joynames[nj.index]);
joynames[nj.index] = NULL;
}
}
for (i = 0; i < MAX_JOY_JOYS; i++) {
SDL_snprintf(s, SDL_arraysize(s), "/dev/joy%d", i);
fd = open(s, O_RDONLY);
if (fd != -1) {
joynames[SDL_numjoysticks++] = strdup(s);
close(fd);
}
}
/* Read the default USB HID usage table. */
hid_init(NULL);
return (SDL_numjoysticks);
}
/*
* Open a joystick for use - the index passed as an argument refers to
* the N'th joystick on the system. This index is the value which will
* identify this joystick in future joystick events.
*
* This function returns a joystick identifier, or NULL if an error occurred.
*/
SDL_Joystick *SDL_JoystickOpen(int device_index)
{
int i;
SDL_Joystick *joystick;
if ( (device_index < 0) || (device_index >= SDL_numjoysticks) ) {
SDL_SetError("There are %d joysticks available",
SDL_numjoysticks);
return(NULL);
}
/* If the joystick is already open, return it */
for ( i=0; SDL_joysticks[i]; ++i ) {
if ( device_index == SDL_joysticks[i]->index ) {
joystick = SDL_joysticks[i];
++joystick->ref_count;
return(joystick);
}
}
/* Create and initialize the joystick */
joystick = (SDL_Joystick *)malloc((sizeof *joystick));
if ( joystick != NULL ) {
memset(joystick, 0, (sizeof *joystick));
joystick->index = device_index;
if ( SDL_SYS_JoystickOpen(joystick) < 0 ) {
free(joystick);
joystick = NULL;
} else {
if ( joystick->naxes > 0 ) {
joystick->axes = (Sint16 *)malloc
(joystick->naxes*sizeof(Sint16));
}
if ( joystick->nhats > 0 ) {
joystick->hats = (Uint8 *)malloc
(joystick->nhats*sizeof(Uint8));
}
if ( joystick->nballs > 0 ) {
joystick->balls = (struct balldelta *)malloc
(joystick->nballs*sizeof(*joystick->balls));
}
if ( joystick->nbuttons > 0 ) {
joystick->buttons = (Uint8 *)malloc
(joystick->nbuttons*sizeof(Uint8));
}
if ( ((joystick->naxes > 0) && !joystick->axes)
|| ((joystick->nhats > 0) && !joystick->hats)
|| ((joystick->nballs > 0) && !joystick->balls)
|| ((joystick->nbuttons > 0) && !joystick->buttons)) {
SDL_OutOfMemory();
SDL_JoystickClose(joystick);
joystick = NULL;
}
if ( joystick->axes ) {
memset(joystick->axes, 0,
joystick->naxes*sizeof(Sint16));
}
if ( joystick->hats ) {
memset(joystick->hats, 0,
joystick->nhats*sizeof(Uint8));
}
if ( joystick->balls ) {
memset(joystick->balls, 0,
joystick->nballs*sizeof(*joystick->balls));
}
if ( joystick->buttons ) {
memset(joystick->buttons, 0,
joystick->nbuttons*sizeof(Uint8));
}
}
}
if ( joystick ) {
/* Add joystick to list */
++joystick->ref_count;
SDL_Lock_EventThread();
for ( i=0; SDL_joysticks[i]; ++i )
/* Skip to next joystick */;
SDL_joysticks[i] = joystick;
SDL_Unlock_EventThread();
}
return(joystick);
}
/*
* Open a joystick for use - the index passed as an argument refers to
* the N'th joystick on the system. This index is the value which will
* identify this joystick in future joystick events.
*
* This function returns a joystick identifier, or NULL if an error occurred.
*/
SDL_Joystick *
SDL_JoystickOpen(int device_index)
{
SDL_Joystick *joystick;
SDL_Joystick *joysticklist;
const char *joystickname = NULL;
if ((device_index < 0) || (device_index >= SDL_NumJoysticks())) {
SDL_SetError("There are %d joysticks available", SDL_NumJoysticks());
return (NULL);
}
joysticklist = SDL_joysticks;
/* If the joystick is already open, return it
* it is important that we have a single joystick * for each instance id
*/
while (joysticklist) {
if (SDL_SYS_GetInstanceIdOfDeviceIndex(device_index) == joysticklist->instance_id) {
joystick = joysticklist;
++joystick->ref_count;
return (joystick);
}
joysticklist = joysticklist->next;
}
/* Create and initialize the joystick */
joystick = (SDL_Joystick *) SDL_malloc((sizeof *joystick));
if (joystick == NULL) {
SDL_OutOfMemory();
return NULL;
}
SDL_memset(joystick, 0, (sizeof *joystick));
if (SDL_SYS_JoystickOpen(joystick, device_index) < 0) {
SDL_free(joystick);
return NULL;
}
joystickname = SDL_SYS_JoystickNameForDeviceIndex(device_index);
if (joystickname)
joystick->name = SDL_strdup(joystickname);
else
joystick->name = NULL;
if (joystick->naxes > 0) {
joystick->axes = (Sint16 *) SDL_malloc(joystick->naxes * sizeof(Sint16));
joystick->axes_zero = (Sint16 *) SDL_malloc(joystick->naxes * sizeof(Sint16));
}
if (joystick->nhats > 0) {
joystick->hats = (Uint8 *) SDL_malloc
(joystick->nhats * sizeof(Uint8));
}
if (joystick->nballs > 0) {
joystick->balls = (struct balldelta *) SDL_malloc
(joystick->nballs * sizeof(*joystick->balls));
}
if (joystick->nbuttons > 0) {
joystick->buttons = (Uint8 *) SDL_malloc
(joystick->nbuttons * sizeof(Uint8));
}
if (((joystick->naxes > 0) && !joystick->axes)
|| ((joystick->nhats > 0) && !joystick->hats)
|| ((joystick->nballs > 0) && !joystick->balls)
|| ((joystick->nbuttons > 0) && !joystick->buttons)) {
SDL_OutOfMemory();
SDL_JoystickClose(joystick);
return NULL;
}
if (joystick->axes) {
SDL_memset(joystick->axes, 0, joystick->naxes * sizeof(Sint16));
SDL_memset(joystick->axes_zero, 0, joystick->naxes * sizeof(Sint16));
}
if (joystick->hats) {
SDL_memset(joystick->hats, 0, joystick->nhats * sizeof(Uint8));
}
if (joystick->balls) {
SDL_memset(joystick->balls, 0,
joystick->nballs * sizeof(*joystick->balls));
}
if (joystick->buttons) {
SDL_memset(joystick->buttons, 0, joystick->nbuttons * sizeof(Uint8));
}
joystick->epowerlevel = SDL_JOYSTICK_POWER_UNKNOWN;
/* Add joystick to list */
++joystick->ref_count;
/* Link the joystick in the list */
joystick->next = SDL_joysticks;
SDL_joysticks = joystick;
SDL_SYS_JoystickUpdate(joystick);
return (joystick);
}
/*
* Open a joystick for use - the index passed as an argument refers to
* the N'th joystick on the system. This index is the value which will
* identify this joystick in future joystick events.
*
* This function returns a joystick identifier, or NULL if an error occurred.
*/
SDL_Joystick *
SDL_JoystickOpen(int device_index)
{
SDL_Joystick *joystick;
SDL_Joystick *joysticklist;
const char *joystickname = NULL;
if ((device_index < 0) || (device_index >= SDL_NumJoysticks())) {
SDL_SetError("There are %d joysticks available", SDL_NumJoysticks());
return (NULL);
}
SDL_LockJoystickList();
joysticklist = SDL_joysticks;
/* If the joystick is already open, return it
* it is important that we have a single joystick * for each instance id
*/
while (joysticklist) {
if (SDL_JoystickGetDeviceInstanceID(device_index) == joysticklist->instance_id) {
joystick = joysticklist;
++joystick->ref_count;
SDL_UnlockJoystickList();
return (joystick);
}
joysticklist = joysticklist->next;
}
/* Create and initialize the joystick */
joystick = (SDL_Joystick *) SDL_calloc(sizeof(*joystick), 1);
if (joystick == NULL) {
SDL_OutOfMemory();
SDL_UnlockJoystickList();
return NULL;
}
if (SDL_SYS_JoystickOpen(joystick, device_index) < 0) {
SDL_free(joystick);
SDL_UnlockJoystickList();
return NULL;
}
joystickname = SDL_SYS_JoystickNameForDeviceIndex(device_index);
if (joystickname)
joystick->name = SDL_strdup(joystickname);
else
joystick->name = NULL;
if (joystick->naxes > 0) {
joystick->axes = (SDL_JoystickAxisInfo *) SDL_calloc(joystick->naxes, sizeof(SDL_JoystickAxisInfo));
}
if (joystick->nhats > 0) {
joystick->hats = (Uint8 *) SDL_calloc(joystick->nhats, sizeof(Uint8));
}
if (joystick->nballs > 0) {
joystick->balls = (struct balldelta *) SDL_calloc(joystick->nballs, sizeof(*joystick->balls));
}
if (joystick->nbuttons > 0) {
joystick->buttons = (Uint8 *) SDL_calloc(joystick->nbuttons, sizeof(Uint8));
}
if (((joystick->naxes > 0) && !joystick->axes)
|| ((joystick->nhats > 0) && !joystick->hats)
|| ((joystick->nballs > 0) && !joystick->balls)
|| ((joystick->nbuttons > 0) && !joystick->buttons)) {
SDL_OutOfMemory();
SDL_JoystickClose(joystick);
SDL_UnlockJoystickList();
return NULL;
}
joystick->epowerlevel = SDL_JOYSTICK_POWER_UNKNOWN;
/* If this joystick is known to have all zero centered axes, skip the auto-centering code */
if (SDL_JoystickAxesCenteredAtZero(joystick)) {
int i;
for (i = 0; i < joystick->naxes; ++i) {
joystick->axes[i].has_initial_value = SDL_TRUE;
}
}
joystick->is_game_controller = SDL_IsGameController(device_index);
/* Add joystick to list */
++joystick->ref_count;
/* Link the joystick in the list */
joystick->next = SDL_joysticks;
SDL_joysticks = joystick;
SDL_UnlockJoystickList();
SDL_SYS_JoystickUpdate(joystick);
return (joystick);
}
SDL_Joystick *SDL_JoystickOpen(int device_index)
{
int i;
SDL_Joystick *joystick;
if ( (device_index < 0) || (device_index >= SDL_numjoysticks) ) {
SDL_SetError("There are %d joysticks available",
SDL_numjoysticks);
return(NULL);
}
for ( i=0; SDL_joysticks[i]; ++i ) {
if ( device_index == SDL_joysticks[i]->index ) {
joystick = SDL_joysticks[i];
++joystick->ref_count;
return(joystick);
}
}
joystick = (SDL_Joystick *)SDL_malloc((sizeof *joystick));
if ( !joystick ) {
SDL_OutOfMemory();
return(NULL);
}
SDL_memset(joystick, 0, (sizeof *joystick));
joystick->index = device_index;
if ( SDL_SYS_JoystickOpen(joystick) < 0 ) {
SDL_free(joystick);
return(NULL);
}
if ( joystick->naxes > 0 ) {
joystick->axes = (Sint16 *)SDL_malloc
(joystick->naxes*sizeof(Sint16));
}
if ( joystick->nhats > 0 ) {
joystick->hats = (Uint8 *)SDL_malloc
(joystick->nhats*sizeof(Uint8));
}
if ( joystick->nballs > 0 ) {
joystick->balls = (struct balldelta *)SDL_malloc
(joystick->nballs*sizeof(*joystick->balls));
}
if ( joystick->nbuttons > 0 ) {
joystick->buttons = (Uint8 *)SDL_malloc
(joystick->nbuttons*sizeof(Uint8));
}
if ( ((joystick->naxes > 0) && !joystick->axes)
|| ((joystick->nhats > 0) && !joystick->hats)
|| ((joystick->nballs > 0) && !joystick->balls)
|| ((joystick->nbuttons > 0) && !joystick->buttons)) {
SDL_OutOfMemory();
SDL_JoystickClose(joystick);
return(NULL);
}
if ( joystick->axes ) {
SDL_memset(joystick->axes, 0,
joystick->naxes*sizeof(Sint16));
}
if ( joystick->hats ) {
SDL_memset(joystick->hats, 0,
joystick->nhats*sizeof(Uint8));
}
if ( joystick->balls ) {
SDL_memset(joystick->balls, 0,
joystick->nballs*sizeof(*joystick->balls));
}
if ( joystick->buttons ) {
SDL_memset(joystick->buttons, 0,
joystick->nbuttons*sizeof(Uint8));
}
++joystick->ref_count;
SDL_Lock_EventThread();
for ( i=0; SDL_joysticks[i]; ++i )
;
SDL_joysticks[i] = joystick;
SDL_Unlock_EventThread();
return(joystick);
}
